<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        #shop-car li {
            border: 1px dotted red;
            margin: 20px 0;
            padding: 20px;
        }

        .container {
            width: 400px;
            padding: 20px;
        }
    </style>
</head>

<body>
    <div class="container">
        <input type="checkbox" id="isAllCheck" /> 全选

        <ul id="shop-car">
            <!-- <li>
                <input type="checkbox" />
                <div>商品名称:</div>
                <img src="https://img12.360buyimg.com/n0/s80x80_jfs/t1/118064/27/12885/59959/5f17b7efE453f688d/5b33ac76b2aaea9b.jpg"
                    alt="">
                <div>商品价格:50</div>
                <div>购买数量:30</div>
                <div>商品规格: 黑</div>
                <div>是否选中：选中吧OR不选中</div>
            </li> -->
        </ul>

        <!-- <p id="totalnum">总数量：xxx</p>
        <p id="totalprice">总价格：xxx</p> -->
    </div>
    <script>
        let products = [{
                goods_name: '小米10-1',
                goods_img: 'https://img12.360buyimg.com/n0/s80x80_jfs/t1/118064/27/12885/59959/5f17b7efE453f688d/5b33ac76b2aaea9b.jpg',
                goods_price: '500',
                goods_attr: '砂石黑4GB+64GB',
                goods_num: 10,
                goods_is_checked: true
            },
            {
                goods_name: '小米10-2',
                goods_img: 'https://img12.360buyimg.com/n0/s80x80_jfs/t1/118064/27/12885/59959/5f17b7efE453f688d/5b33ac76b2aaea9b.jpg',
                goods_price: '510',
                goods_attr: '砂石黑4GB+64GB',
                goods_num: 50,
                goods_is_checked: false
            }
        ];
        let isAllCheck = document.querySelector('#isAllCheck');
        let ul = document.querySelector('ul');
        let str = '';
        let num = 0;
        let price = 0;
        for (let i = 0; i < products.length; i++) {
            str += `<li>
                <input type="checkbox" ${products[i].goods_is_checked ? 'checked':''}/>
                <div>商品名称:${products[i].goods_name}</div>
                <img src="${products[i].goods_img}"alt="">
                <div>商品价格:${products[i].goods_price}</div>
                <div>购买数量:${products[i].goods_num}</div>
                <div>商品规格:${products[i].goods_attr}</div>
                <div>是否选中:${products[i].goods_is_checked ? '是':'否'}</div>
                </li>`
        }
        let tag = products.every(function (item) {
            return item.goods_is_checked;
        });
        for (let i = 0; i < products.length; i++) {
            if (tag) {
                isAllCheck.setAttribute('checked', 'checked');
                num += products[i].goods_num;
                price += products[i].goods_num * parseInt(products[i].goods_price)
            } else {
                isAllCheck.removeAttribute('checked');
                if (products[i].goods_is_checked == true) {
                    num += products[i].goods_num;
                    price += products[i].goods_num * parseInt(products[i].goods_price)
                }
            }
        }
        str += `<p id="totalnum">总数量：${num}个</p>
        <p id="totalprice">总价格：${price}元</p>`

        ul.innerHTML = str;
    </script>
</body>

</html>